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        <h1>Abdominal and Direct Fetal Electrocardiogram Database</h1>
    

    
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    <aside id='doi'>DOI for<br> Abdominal and Direct Fetal Electrocardiogram Database:<p></p></aside>
    <a id="content" ></a>
    <article id="page"><!-- added by KP, 12 June 2015 -->


<div class="notice">

<p>
<b>When referencing this material, please cite at least one of the following
publications:</b></p>
<ol>
<li> Jezewski J, Matonia A, Kupka T, Roj D, Czabanski R.
<a href="http://www.degruyter.com/view/j/bmte.ahead-of-print/bmt-2011-0130/bmt-2011-0130.xml"
target="other">>Determination of the fetal heart rate from abdominal signals:
evaluation of beat-to-beat accuracy in relation to the direct fetal
electrocardiogram</a>.
<em>Biomedical Engineering/Biomedizinische Technik</em> 2012 Jul;57(5):383-394.
doi:10.1515/bmt-2011-0130.</li>

<li> Matonia A, Jezewski J, Kupka T, Horoba K, Wrobel J, Gacek A.
<a href="http://www.ncbi.nlm.nih.gov/pubmed/16937181" target="other">The
influence of coincidence of fetal and maternal QRS complexes on fetal heart
rate reliability</a>.
<em>Medical &amp; Biological Engineering &amp; Computing</em>
2006;44(5):393-403.</li>

<li> Kotas M, Jezewski J, Horoba L, Matonia A.
<a href="http://www.ncbi.nlm.nih.gov/pubmed/20701992"
target="other">Application of spatio-temporal filtering to fetal
electrocardiogram enhancement</a>.
<em>Computer Methods and Programs in Biomedicine</em>. 2011 Oct;104(1):1-9.</li>

<li> Kotas M, Jezewski J, Matonia A, Kupka T.
<a href="http://www.ncbi.nlm.nih.gov/pubmed/19819040" target="other">Towards
noise immune detection of fetal QRS complexes</a>.
<em>Computer Methods and Programs in Biomedicine</em>. 2010 Mar;97(3):241-256.</li>
</ol>

<p>
<b>Please also include the standard citation for PhysioNet:</b></p>
<blockquote>
Goldberger AL, Amaral LAN, Glass L, Hausdorff JM, Ivanov PCh, Mark RG,
Mietus JE, Moody GB, Peng C-K, Stanley HE.  PhysioBank, PhysioToolkit, and
PhysioNet: Components of a New Research Resource for Complex Physiologic
Signals.
<i>Circulation</i> <b>101</b>(23):e215-e220 [Circulation Electronic Pages;
<a href="http://circ.ahajournals.org/cgi/content/full/101/23/e215"
target="other">http://circ.ahajournals.org/cgi/content/full/101/23/e215</a>];
2000 (June 13).
</blockquote>
</div>

<p> The research material included in the Abdominal and Direct Fetal
Electrocardiogram Database contains multichannel fetal electrocardiogram (FECG)
recordings obtained from 5 different women in labor, between
38 and 41 weeks of gestation. The recordings were acquired in the Department of
Obstetrics at the Medical University of Silesia, by means of the KOMPOREL
system for acquisition and analysis of fetal electrocardiogram (ITAM
Institute, Zabrze, Poland). Each recording comprises four differential signals
acquired from maternal abdomen and the reference direct fetal electrocardiogram
registered from the fetal head.</p>

<p> The configuration of the abdominal electrodes comprised four electrodes
placed around the navel, a reference electrode placed above the pubic symphysis
and a common mode reference electrode (with active-ground signal) placed on the
left leg. To reduce the skin impedance, the areas under the Ag-AgCl electrodes
were abraded. In all cases, the scalp electrode was placed for a clinical
indication and all women consented to participate in this study.</p>

<p> The acquisition of direct fetal electrocardiogram was carried out with 
a typical spiral electrode, commonly used in a direct FECG channel of popular 
fetal monitors. The R-wave locations were automatically determined in the 
direct FECG signal by means of on-line analysis applied in the KOMPOREL system. 
These locations were then verified (off-line) by a group of cardiologists, 
resulting in a set of reference markers precisely indicating the R-wave 
locations. The markers have been stored together with the direct and indirect 
FECG signals in EDF/EDF+ format.</p>

<p> The provided recordings constitute an excellent material for testing and
evaluation of efficacy of new FECG processing techniques, e.g. algorithms for
suppression of maternal electrocardiogram in abdominal signals or for detection
of fetal QRS complexes. In the authors' studies (1-4 above), these recordings
were used to evaluate the accuracy of fetal heart rate measurement and to
estimate its influence on the quantification of the beat-to-beat fetal heart
rate (FHR) variability.</p>

<p><b>Recording information: </b></p>

<ul>
<li> Signals recorded in labor, between 38 and 41 weeks of gestation</li>
<li> Four signals acquired from maternal abdomen</li>
<li> Direct electrocardiogram recorded simultaneously from fetal head</li>
<li> Positioning of electrodes was constant during all recordings</li>
<li> Ag-AgCl electrodes (3M Red Dot 2271) and abrasive material to improve skin
conductance (3M Red Dot Trace Prep 2236)</li>
<li> Bandwidth: 1Hz - 150Hz (synchronous sampling of all signals)</li>
<li> Additional digital filtering for removal of power-line interference (50Hz)
and baseline drift</li>
<li> Sampling rate: 1 kHz</li>
<li> Resolution: 16 bits</li>
<li> Input ranges are included in the records in EDF format</li>
</ul>

<pre><img src="/icons/blank.gif" alt="Icon " width="20" height="22"> <a href="?C=N;O=D">Name</a>                    <a href="?C=M;O=A">Last modified</a>      <a href="?C=S;O=A">Size</a>  <a href="?C=D;O=A">Description</a><hr><img src="/icons/back.gif" alt="[DIR]" width="20" height="22"> <a href="/physiobank/database/">Parent Directory</a>                             -   
<img src="/icons/index.gif" alt="[   ]" width="20" height="22"> <a href="ANNOTATORS">ANNOTATORS</a>              06-Aug-2012 19:43   30   list of annotators
<img src="/icons/unknown.gif" alt="[   ]" width="20" height="22"> <a href="MD5SUMS">MD5SUMS</a>                 12-Dec-2012 11:36  574   
<img src="/icons/index.gif" alt="[   ]" width="20" height="22"> <a href="RECORDS">RECORDS</a>                 12-Dec-2012 11:35   40   list of record names
<img src="/icons/unknown.gif" alt="[   ]" width="20" height="22"> <a href="SHA1SUMS">SHA1SUMS</a>                12-Dec-2012 11:36  678   
<img src="/icons/unknown.gif" alt="[   ]" width="20" height="22"> <a href="SHA256SUMS">SHA256SUMS</a>              12-Dec-2012 11:36  1.0K  
<img src="/icons/binary.gif" alt="[   ]" width="20" height="22"> <a href="r01.edf">r01.edf</a>                 02-Aug-2012 06:14  2.9M  digitized signals
<img src="/icons/binary.gif" alt="[   ]" width="20" height="22"> <a href="r01.edf.qrs">r01.edf.qrs</a>             02-Aug-2012 06:14  1.3K  verified beat annotations
<img src="/icons/binary.gif" alt="[   ]" width="20" height="22"> <a href="r04.edf">r04.edf</a>                 02-Aug-2012 06:15  2.9M  digitized signals
<img src="/icons/binary.gif" alt="[   ]" width="20" height="22"> <a href="r04.edf.qrs">r04.edf.qrs</a>             02-Aug-2012 06:15  1.3K  verified beat annotations
<img src="/icons/binary.gif" alt="[   ]" width="20" height="22"> <a href="r07.edf">r07.edf</a>                 02-Aug-2012 06:15  2.9M  digitized signals
<img src="/icons/binary.gif" alt="[   ]" width="20" height="22"> <a href="r07.edf.qrs">r07.edf.qrs</a>             02-Aug-2012 06:15  1.3K  verified beat annotations
<img src="/icons/binary.gif" alt="[   ]" width="20" height="22"> <a href="r08.edf">r08.edf</a>                 02-Aug-2012 06:15  2.9M  digitized signals
<img src="/icons/binary.gif" alt="[   ]" width="20" height="22"> <a href="r08.edf.qrs">r08.edf.qrs</a>             02-Aug-2012 06:16  1.3K  verified beat annotations
<img src="/icons/binary.gif" alt="[   ]" width="20" height="22"> <a href="r10.edf">r10.edf</a>                 02-Aug-2012 06:16  2.9M  digitized signals
<img src="/icons/binary.gif" alt="[   ]" width="20" height="22"> <a href="r10.edf.qrs">r10.edf.qrs</a>             02-Aug-2012 06:16  1.3K  verified beat annotations
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